Euclid's Elements is the first periodic table that consisted of air, earth, fire, and water. The wall charts were about 10 inches by 10 inches, and were inexpensive to print. A conspiracy among printing corporations led to the modern periodic table that required all science classrooms to replace their wall decorations with newer, larger, and more expensive posters. Euclid also wrote a humorous song listing all the elements (which he called "Elements"), although it was quite short.